Remove last remnants of ENABLE_SVG

Source/core/svg/SVGMaskElement.idl

Index: Source/core/svg/SVGMaskElement.idl
diff --git a/Source/core/svg/SVGMaskElement.idl b/Source/core/svg/SVGMaskElement.idl
index 1a40de9fa05eda8eb41d33aef5be61e521a8f296..66cad0c24cd19ab1eb5c32bafb364c8e2b03672f 100644
--- a/Source/core/svg/SVGMaskElement.idl
+++ b/Source/core/svg/SVGMaskElement.idl
@@ -23,12 +23,10 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
-[
-    Conditional=SVG
-] interface SVGMaskElement : SVGStyledElement,
-                                             SVGTests,
-                                             SVGLangSpace,
-                                             SVGExternalResourcesRequired {
+interface SVGMaskElement : SVGStyledElement,
+                           SVGTests,
+                           SVGLangSpace,
+                           SVGExternalResourcesRequired {
     readonly attribute SVGAnimatedEnumeration maskUnits;
     readonly attribute SVGAnimatedEnumeration maskContentUnits;